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About the Cover
Cover: The cover shows drawings of six co-occurring hydromedusae of the Puget Sound, Washington, USA. They are drawn here in their feeding modes. The ambush predators, Proboscidactyla flavicirrata, Sarsia sp. and Aglantha digitale (shown from the top right corner diagonally down to the left), sit motionlessly with their tentacles extended, while the cruising predators, Phialidium gregarium (lower left corner), Aequorea victoria (upper left corner) and Mitrocoma cellularia (lower right corner), frequently swim with their tentacles extended, drawing prey into their tentacles with the flow generated while swimming. Colin and Costello (pp. 427-437) demonstrate that the different types of predator use different types of propulsive mode, the ambush predators jet propel and the cruising predators row, and they relate the different propulsive modes to the swimming performance, morphology and feeding of the medusae. Drawing by S. P. Colin.
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